S4 - Physics Test (4)

Question 1

How old is our universe?

Answer 1

14 billion years old

Question 2

What did our universe start off as?

Answer 2

A hot and dense singularity

Question 3

What did the ‘Big Bang’ create?

Answer 3

matter and anti-matter

Question 4

What happened when matter and anti-matter collided with each other?

Answer 4

They annihilated each other, creating light and leaving some matter left over

Question 5

What is the universe mostly made up of?

Answer 5

Dark energy and dark matter

Question 5

What is the universe continuously doing?

Answer 5

Expanding

Question 6

What is the order of the planets from the sun?

Answer 6

Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune

Question 7

What is a moon?

Answer 7

A lump of matter which orbits a planet

Question 8

What is a planet?

Answer 8

A spherical ball of rock and or gas which orbits a star

Question 9

What is a dwarf planet?

Answer 9

Orbits a star but is not large enough or roughly spherical to be classed as a planet

Question 10

What is an asteroid?

Answer 10

An orbiting object which is even smaller than a dwarf planet

Question 11

What is the sun?

Answer 11

A star orbited by planets and stationed at the centre of our solar system

Question 12

What is a star?

Answer 12

A hot ball of matter which is undergoing nuclear fusion to emit light

Question 13

What is a solar system?

Answer 13

Consists of a star and objects orbiting that star

Question 14

What is a galaxy?

Answer 14

A large cluster of stars

Question 15

What is the universe?

Answer 15

Many galaxies separated by empty space

Question 16

What is an exoplanet?

Answer 16

A planet outside our solar system

Question 17

What is a light year?

Answer 17

The distance light travels in one year

Question 18

How do we calculate a light year?

Answer 18

d = v x t
3x10^8 x (365x24x60x60)

Question 19

What is a refracting telescope made up of?

Answer 19

2 convex lenses enclosed in a light tube

Question 20

What can the two convex lenses in a refracting telescope be identified as?

Answer 20

Objective lens and Eyepiece lens

Question 21

What features does a objective lens have?

Answer 21

Long focal length, thin lens

Question 22

What features does an eyepiece lens have?

Answer 22

Short focal length, thick lens

Question 23

What does the objective lens do?

Answer 23

Collects light and produces an image

Question 24

What does the eyepiece lens do?

Answer 24

Magnifies the image produced by the objective lens

Question 25

What uses do satellites have?

Answer 25

- GPS - Weather forecasting - Communications - Scientific discovery - Space exploration

Question 26

What is a geostational satellite and why?

Answer 26

A special type of satellite, it is always situated above the equator

Question 27

What is the altitude of a geostational satellite, and what is it's period?

Answer 27

36,000km, 24hrs

Question 28

What is the period of a satellite?

Answer 28

The time taken to orbit a planet once

Question 29

What is a projectile?

Answer 29

An object that follows a curved path

Question 30

What features do projectiles have?

Answer 30

- follow a certian patern - constant horizontal velocity - constant vertical acceleration

Question 31

How do you calculate horizontal speed?

Answer 31

V = d / t where V and d = horizontal velocity and distance

Question 32

How do you calculate vertical acceleration?

Answer 32

a = v - u / t where v = vertical velocity and a = acceleration due to gravity

Question 33

What is 'a' always?

Answer 33

9.8 m/s

Question 34

What are he two types of spectra?

Answer 34

Continuous and line

Question 35

What is the order of colours in the spectrum from lowest frequency to highest?

Answer 35

ROYGBIV

Question 36

What is the order of colours in the spectrum from lowest energy to highest?

Answer 36

ROYGBIV

Question 37

What is the order of colours in the spectrum from shortest wavelength to longest?

Answer 37

ROYGBIV

Question 38

What is continuous spectra emitting?

Answer 38

White light - all wavelengths of visible light

Question 39

What does line spectra emit?

Answer 39

Particular wavelengths of light